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20130416
20130424
Search Results 0 to 3 of about 4 (some duplicates have been removed)
: in terms of water supply, wastewater, stormwater development -- these are independent technologies. but what came first, most often, was a water supply system. the basic system is essentially the same as we used back in the 19th century. and in some cases, some of the same pipes. grusheski: philadelphia was the first american city to develop a water system and to take on as a municipal responsibility water delivery to all of its citizens. when william penn laid out the city, he actually chose a spot of land that had a lot of groundwater. however, by 1730, 30,000 people lived within the first seven blocks of philadelphia, next to the delaware river. well, 30,000 people caused filth in the city and polluted their water sources. the groundwater was not potable. and in one year, 1/6 of the population died of yellow fever. now, they didn't know at the time that yellow fever was carried by mosquitoes. but the health issue was major in that first movement to build a water system. narrator: so they set out to find the cleanest source of water. although the majority of philadelphia's water
of each project such as location, construction technology and a purpose. the tower is a marvelous expression of mr. pally's -- commitment. please welcome cesar pally. [ applause ] >> this is a very important day for me today. i have been dreaming about this tower and the center for over 6 years. now, this is all going to be reality. i hope not for long we'll all gather here to celebrate the opening of the tower and the center. i have always loved san francisco. it's an incredible city. it's dynamic at the same time, it's gentle, it's an incredible place. we have designed the tower appropriate for this city. the tower will be a dynamic, elegant and very gracious. it will be building appropriate tower for this great city. now that it seems to be the tallest tower, but west of the mississippi, what a marvelous marker for this place. when you see it as a distance, this tower, you will know that the center is at it's space. when you arrive in san francisco from los angeles or san diego, you will be in this tower. so it's a marvelous combination to have the gateway to the city and the t
technologies, often by a robot... or personally by a technician on a bicycle. sensors detect breaks, cracks, and weaknesses in the pipe. man: we have roots at this cap lateral at 79. narrator: tree roots can grow into the pipe, splitting it apart. man: more light roots at 69. narrator: sometimes they may even find fully collapsed sections. after gathering the data, utilities can assess the need for rehabilitation. sinha: you have to choose the rehabilitation technique so that the life of the pipe can be extended 30 years, 40 years, 50 years. allbee: any asset has an optimal investment strategy. if you're making investments in that asset too early, or too late, you're wasting money. it costs about three times as much to fix a system once it's failed. so it's all about finding that right point where the dollars should flow toward that asset. narrator: but finding the funds to evaluate and rebuild these assets is an ongoing struggle. johnson: there is a gap between what's being spent by municipalities and water supply systems and what needs to be spent. and somehow that has to be made up. so t
Search Results 0 to 3 of about 4 (some duplicates have been removed)